JP2003064358A - Fluorescent substance and light-emitting element using the same and image display device and illuminating device - Google Patents

Fluorescent substance and light-emitting element using the same and image display device and illuminating device

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Publication number
JP2003064358A
JP2003064358A JP2001257420A JP2001257420A JP2003064358A JP 2003064358 A JP2003064358 A JP 2003064358A JP 2001257420 A JP2001257420 A JP 2001257420A JP 2001257420 A JP2001257420 A JP 2001257420A JP 2003064358 A JP2003064358 A JP 2003064358A
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JP
Japan
Prior art keywords
light
metal element
phosphor
formula
emitting element
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP2001257420A
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Japanese (ja)
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JP4032682B2 (en
Inventor
Yasuo Shimomura
康夫 下村
Naoto Kijima
直人 木島
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Mitsubishi Chemical Corp
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Mitsubishi Chemical Corp
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Priority to JP2001257420A priority Critical patent/JP4032682B2/en
Publication of JP2003064358A publication Critical patent/JP2003064358A/en
Priority to US11/560,007 priority patent/US20070085466A1/en
Application granted granted Critical
Publication of JP4032682B2 publication Critical patent/JP4032682B2/en
Priority to US12/124,595 priority patent/US7790058B2/en
Priority to US12/843,454 priority patent/US20100283383A1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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    • C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
    • C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
    • C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
    • C09K11/7728—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing europium
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    • H01L2224/45099—Material
    • H01L2224/451—Material with a principal constituent of the material being a metal or a metalloid, e.g. boron (B), silicon (Si), germanium (Ge), arsenic (As), antimony (Sb), tellurium (Te) and polonium (Po), and alloys thereof
    • H01L2224/45138—Material with a principal constituent of the material being a metal or a metalloid, e.g. boron (B), silicon (Si), germanium (Ge), arsenic (As), antimony (Sb), tellurium (Te) and polonium (Po), and alloys thereof the principal constituent melting at a temperature of greater than or equal to 950°C and less than 1550°C
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    • H01L2224/42—Wire connectors; Manufacturing methods related thereto
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    • H01L2224/42—Wire connectors; Manufacturing methods related thereto
    • H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
    • H01L2224/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
    • H01L2224/481—Disposition
    • H01L2224/48151—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive
    • H01L2224/48221—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked
    • H01L2224/48245—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being metallic
    • H01L2224/48247—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being metallic connecting the wire to a bond pad of the item
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    • H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
    • H01L2224/42—Wire connectors; Manufacturing methods related thereto
    • H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
    • H01L2224/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
    • H01L2224/481—Disposition
    • H01L2224/48151—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive
    • H01L2224/48221—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked
    • H01L2224/48245—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being metallic
    • H01L2224/48257—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being metallic connecting the wire to a die pad of the item
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    • H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
    • H01L2224/42—Wire connectors; Manufacturing methods related thereto
    • H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
    • H01L2224/49—Structure, shape, material or disposition of the wire connectors after the connecting process of a plurality of wire connectors
    • H01L2224/491—Disposition
    • H01L2224/49105—Connecting at different heights
    • H01L2224/49107—Connecting at different heights on the semiconductor or solid-state body
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    • H01L2924/15—Details of package parts other than the semiconductor or other solid state devices to be connected
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    • H01L33/00—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L33/48—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
    • H01L33/50—Wavelength conversion elements
    • H01L33/501—Wavelength conversion elements characterised by the materials, e.g. binder
    • H01L33/502—Wavelength conversion materials

Abstract

PROBLEM TO BE SOLVED: To provide a readily producible fluorescent substance capable of affording a light-emitting element having high color rendering properties, the light-emitting element using the fluorescent substance and an image display device and an illuminating device using the light-emitting element as a light source. SOLUTION: This fluorescent substance comprises a compound of a garnet crystal structure represented by the following general formula (I) M<1> a M<2> b M<3> c Od (I) [wherein, M<1> denotes a bivalent metal element; M<2> denotes a trivalent metal element; M<3> denotes a tetravalent metal element; a is a number within the range of 2.7-3.3; b is a number within the range of 1.8-2.2; c is a number within the range of 2.7-3.3; and d is a number within the range of 11.0-13.0] as a matrix and luminescence center ions in the matrix. The light-emitting element is composed of the fluorescent substance as a wavelength converting material and a semiconductor light-emitting element emitting light within the range of ultraviolet to visible light. The image display device and illuminating device comprise the light-emitting element as the light source.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【発明の属する技術分野】本発明は、母体化合物が発光
中心イオンを含有する蛍光体、更に詳しくは、波長変換
材料として、紫外光から可視光の範囲の光を吸収してよ
り長波長の可視光を発し、発光ダイオード（ＬＥＤ）や
レーザーダイオード（ＬＤ）等の半導体発光素子と組み
合わせることにより演色性の高い発光素子を構成するこ
とができる蛍光体、及び、それを用いた発光素子、並び
にその発光素子を光源とする画像表示装置、照明装置に
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a phosphor in which a base compound contains a luminescent center ion, and more specifically, as a wavelength conversion material, it absorbs light in the range from ultraviolet light to visible light and has a longer wavelength visible light. Phosphor that emits light and can form a light emitting device with high color rendering by combining with a semiconductor light emitting device such as a light emitting diode (LED) or a laser diode (LD), and a light emitting device using the same The present invention relates to an image display device and a lighting device using a light emitting element as a light source.

【０００２】[0002]

【従来の技術】従来より、半導体発光素子としての窒化
ガリウム（ＧａＮ）系青色発光ダイオードと、波長変換
材料としての蛍光体とを組み合わせて構成される白色発
光の発光素子が、消費電力が小さく長寿命であるという
特徴を活かして画像表示装置や照明装置の発光源として
注目されている。2. Description of the Related Art Conventionally, a white light emitting element formed by combining a gallium nitride (GaN) type blue light emitting diode as a semiconductor light emitting element and a phosphor as a wavelength conversion material has a long power consumption and a long power consumption. Taking advantage of its long life, it is attracting attention as a light emitting source for image display devices and lighting devices.

【０００３】この発光素子は、そこで用いられる蛍光体
が、ＧａＮ系青色発光ダイオードの発する青色領域の可
視光を吸収して黄色光を発光することから、蛍光体に吸
収されなかったダイオードの青色光との混色により白色
の発光が得られるものであって、その蛍光体としては、
代表的には、イットリウム・アルミニウム複合酸化物
（Ｙ3 Ａｌ5 Ｏ12）を母体とし、該母体内に発光中心イ
オンとしてのセリウム（Ｃｅ）を含有してなる蛍光体が
知られているが、この蛍光体は、焼成温度が高い等、製
造が必ずしも容易と言えるものではなかった。In this light emitting device, the phosphor used therein absorbs visible light in the blue region emitted by the GaN blue light emitting diode and emits yellow light, so that the blue light of the diode not absorbed by the phosphor is emitted. White light emission is obtained by mixing with and, and as the phosphor,
Typically, there is known a phosphor having a matrix of yttrium-aluminum composite oxide (Y 3 Al 5 O 12 ) and containing cerium (Ce) as an emission center ion in the matrix. This phosphor was not always easy to manufacture because of its high firing temperature.

【０００４】[0004]

【発明が解決しようとする課題】本発明は、前述の従来
技術に鑑み、製造が容易な蛍光体を、更には、より演色
性の高い発光素子を得ることができる蛍光体を開発すべ
くなされたものであって、従って、本発明は、製造が容
易であると共に、演色性の高い発光素子を得ることがで
きる蛍光体、及び、その蛍光体を用いた発光素子、並び
に、その発光素子を光源とする画像表示装置及び照明装
置を提供することを目的とする。SUMMARY OF THE INVENTION In view of the above-mentioned prior art, the present invention has been made to develop a phosphor that is easy to manufacture, and further to develop a phosphor that can obtain a light emitting device having a higher color rendering property. Therefore, the present invention provides a phosphor that is easy to manufacture and that can provide a light emitting device with high color rendering, a light emitting device using the phosphor, and a light emitting device thereof. An object is to provide an image display device and a lighting device that use a light source.

【０００５】[0005]

【課題を解決するための手段】本発明者等は、前記課題
を解決すべく鋭意検討した結果、特定のガーネット結晶
構造の化合物を母体とし、該母体内に発光中心イオンを
含有してなる蛍光体が、前記目的を達成できることを見
い出し本発明に到達したもので、従って、本発明は、下
記一般式(I) で表されるガーネット結晶構造の化合物を
母体とし、該母体内に発光中心イオンを含有してなる蛍
光体、及び、波長変換材料としての該蛍光体と、紫外光
から可視光の範囲の光を発光する半導体発光素子とから
構成されてなる発光素子、並びに、該発光素子を光源と
する画像表示装置及び照明装置、を要旨とする。Means for Solving the Problems The inventors of the present invention have conducted extensive studies to solve the above problems, and as a result, have a fluorescent substance comprising a compound having a specific garnet crystal structure as a host and containing a luminescent center ion in the host. The body has reached the present invention by finding that the above objects can be achieved, and therefore, the present invention provides a compound having a garnet crystal structure represented by the following general formula (I) as a matrix, and the luminescent center ion in the matrix. A phosphor containing, and a phosphor as a wavelength conversion material, and a light-emitting element composed of a semiconductor light-emitting element that emits light in the range of ultraviolet light to visible light, and the light-emitting element The gist is an image display device and a lighting device that use a light source.

【０００６】Ｍ1 a Ｍ2 b Ｍ3 c Ｏd (I) 〔式(I) 中、Ｍ1 は２価の金属元素、Ｍ2 は３価の金属
元素、Ｍ3 は４価の金属元素をそれぞれ示し、ａは２．
７〜３．３、ｂは１．８〜２．２、ｃは２．７〜３．
３、ｄは１１．０〜１３．０の範囲の数である。〕M 1 a M 2 b M 3 c O d (I) [In the formula (I), M 1 is a divalent metal element, M 2 is a trivalent metal element, and M 3 is a tetravalent metal element. Respectively, and a is 2.
7 to 3.3, b is 1.8 to 2.2, and c is 2.7 to 3.
3 and d are numbers in the range of 11.0 to 13.0. ]

【０００７】[0007]

【発明の実施の形態】本発明の蛍光体は、前記一般式
(I) で表されるガーネット結晶構造の化合物を母体とす
るものであり、一般に、Ｍ1 、Ｍ2 、及びＭ3 の金属元
素を含む複合酸化物であり、Ｍ1 3 Ｍ2 2 Ｍ3 3 Ｏ12で
表される公知のガーネット結晶構造の化合物の中で、本
発明においては、そのＭ1 が２価、Ｍ2 が３価、Ｍ3 が
４価の金属元素である化合物を蛍光体の母体とすること
を特徴とする。BEST MODE FOR CARRYING OUT THE INVENTION The phosphor of the present invention has the general formula
A compound having a garnet crystal structure represented by (I) as a matrix, which is generally a composite oxide containing M 1 , M 2 , and M 3 metal elements, and M 1 3 M 2 2 M 3 Among known compounds having a garnet crystal structure represented by 3 O 12 , in the present invention, a compound in which M 1 is a divalent metal, M 2 is a trivalent metal, and M 3 is a tetravalent metal element is a phosphor. It is characterized as the mother of.

【０００８】即ち、本発明は、蛍光体の母体として、例
えば、前記Ｙ3 Ａｌ5 Ｏ12等の複合酸化物が知られ、
又、Ｍ1 が２価、Ｍ2 が３価、Ｍ3 が４価の金属元素の
ガーネット結晶構造の化合物も前述の如く知られている
ものの、蛍光体としての特性はその母体を構成する元素
及びその原子価等によって大きく変化するのに対して、
このＭ1 が２価、Ｍ2 が３価、Ｍ3 が４価の金属元素の
ガーネット結晶構造の化合物が蛍光体の母体として優れ
ていることを見い出したことに依拠するものである。That is, in the present invention, for example, a composite oxide such as Y 3 Al 5 O 12 is known as a matrix of the phosphor,
Further, although a compound having a garnet crystal structure of a metal element in which M 1 is divalent, M 2 is trivalent, and M 3 is tetravalent is known as described above, the characteristic as a phosphor is an element constituting the matrix. , And its valence change greatly,
This is based on the finding that a compound having a garnet crystal structure of a metal element in which M 1 is divalent, M 2 is trivalent, and M 3 is tetravalent is excellent as a matrix of a phosphor.

【０００９】ここで、式(I) における２価の金属元素Ｍ
1 としては、発光効率等の面から、Ｍｇ、Ｃａ、Ｚｎ、
Ｓｒ、Ｃｄ、及びＢａからなる群から選択された少なく
とも１種であるのが好ましく、Ｍｇ、Ｃａ、又はＺｎで
あるのが更に好ましく、Ｃａ、又はＣａとＭｇであるの
が特に好ましい。Here, the divalent metal element M in the formula (I)
1 , in terms of luminous efficiency, etc., Mg, Ca, Zn,
It is preferably at least one selected from the group consisting of Sr, Cd, and Ba, more preferably Mg, Ca, or Zn, particularly preferably Ca, or Ca and Mg.

【００１０】又、式(I) における３価の金属元素Ｍ2 と
しては、同様の面から、Ａｌ、Ｓｃ、Ｇａ、Ｙ、Ｉｎ、
Ｌａ、Ｇｄ、及びＬｕからなる群から選択された少なく
とも１種であるのが好ましく、Ａｌ、Ｓｃ、Ｙ、又はＬ
ｕであるのが更に好ましく、Ｓｃ、又はＳｃとＹ、又は
ＳｃとＬｕであるのが特に好ましい。Further, as the trivalent metal element M 2 in the formula (I), from the same viewpoint, Al, Sc, Ga, Y, In,
It is preferably at least one selected from the group consisting of La, Gd, and Lu, and is Al, Sc, Y, or L.
It is more preferably u, and particularly preferably Sc, or Sc and Y, or Sc and Lu.

【００１１】又、式(I) における４価の金属元素Ｍ3 と
しては、同様の面から、Ｓｉ、Ｔｉ、Ｇｅ、Ｚｒ、Ｓ
ｎ、及びＨｆからなる群から選択された少なくとも１種
であるのが好ましく、Ｓｉ、Ｇｅ、又はＳｎである更に
好ましく、Ｓｉであるのが特に好ましい。Further, as the tetravalent metal element M 3 in the formula (I), from the same viewpoint, Si, Ti, Ge, Zr, S
It is preferably at least one selected from the group consisting of n and Hf, more preferably Si, Ge, or Sn, and particularly preferably Si.

【００１２】又、ガーネット結晶構造は、一般には、前
述したように、式(I) におけるａが３、ｂが２、ｃが３
で、ｄが１２の体心立方格子の結晶であるが、本発明に
おいては、後述する発光中心イオンの元素が、Ｍ1 、Ｍ
2 、Ｍ3 のいずれかの金属元素の結晶格子の位置に置換
するか、或いは、結晶格子間の隙間に配置する等によ
り、式(I) においてａが３、ｂが２、ｃが３で、ｄが１
２とはならない場合もあり得、従って、ａは２．７〜
３．３、ｂは１．８〜２．２、ｃは２．７〜３．３、ｄ
は１１．０〜１３．０の範囲の数をとることとなり、ａ
は２．９〜３．１、ｂは１．９５〜２．０５、ｃは２．
９〜３．１の範囲の数であるのがそれぞれ好ましく、ｄ
は１１．６５〜１２．３５の範囲の数であるのが好まし
い。Further, the garnet crystal structure generally has, as described above, a = 3, b = 2, and c = 3 in the formula (I).
In the present invention, the element of the luminescence center ion, which will be described later, is M 1 , M
In the formula (I), a is 3, b is 2, c is 3 by substituting at the position of the crystal lattice of any one of the metal elements of M 2 and M 3 , or by arranging in the gap between the crystal lattices. , D is 1
It may not be 2, so that a is 2.7 to
3.3, b is 1.8 to 2.2, c is 2.7 to 3.3, d
Takes a number in the range of 11.0 to 13.0, and a
Is 2.9 to 3.1, b is 1.95 to 2.05, and c is 2.
Each is preferably a number in the range 9 to 3.1, d
Is preferably a number in the range 11.65 to 12.35.

【００１３】又、前記ガーネット結晶構造の化合物母体
内に含有される発光中心イオンとしては、前記と同様の
面から、Ｃｒ、Ｍｎ、Ｆｅ、Ｃｏ、Ｎｉ、Ｃｕ、Ｃｅ、
Ｐｒ、Ｎｄ、Ｓｍ、Ｅｕ、Ｔｂ、Ｄｙ、Ｈｏ、Ｅｒ、Ｔ
ｍ、及びＹｂからなる群から選択された少なくとも１種
の２〜４価の元素であるのが好ましく、２価のＭｎ、３
価のＣｅ、２〜３価のＥｕ、又は３価のＴｂであるのが
更に好ましく、３価のＣｅであるのが特に好ましい。The emission center ions contained in the compound matrix having the garnet crystal structure are Cr, Mn, Fe, Co, Ni, Cu, Ce, from the same aspect as described above.
Pr, Nd, Sm, Eu, Tb, Dy, Ho, Er, T
It is preferably at least one element having 2 to 4 valences selected from the group consisting of m and Yb, and divalent Mn, 3
It is more preferable that it is valent Ce, divalent or trivalent Eu, or trivalent Tb, and it is particularly preferable that it is trivalent Ce.

【００１４】本発明の前記蛍光体は、前記一般式(I) に
おける２価の金属元素Ｍ1 源化合物、３価の金属元素Ｍ
2 源化合物、及び４価の金属元素Ｍ3 源化合物、並び
に、発光中心イオンの元素源化合物を、ハンマーミル、
ロールミル、ボールミル、ジェットミル等の乾式粉砕機
を用いて粉砕した後、リボンブレンダー、Ｖ型ブレンダ
ー、ヘンシェルミキサー等の混合機により混合するか、
或いは、混合した後、乾式粉砕機を用いて粉砕する乾式
法、又は、水等の媒体中にこれらの化合物を加え、媒体
攪拌式粉砕機等の湿式粉砕機を用いて粉砕及び混合する
か、或いは、これらの化合物を乾式粉砕機により粉砕し
た後、水等の媒体中に加え混合することにより調製され
たスラリーを、噴霧乾燥等により乾燥させる湿式法によ
り、調製した粉砕混合物を、加熱処理して焼成すること
により製造される。The phosphor of the present invention is a divalent metal element M 1 source compound in the general formula (I), and a trivalent metal element M.
2 source compound, and tetravalent metal elements M 3 source compound, and, an element source compound for the luminescent center ion, a hammer mill,
After pulverizing with a dry pulverizer such as a roll mill, a ball mill, a jet mill or the like, mixing with a mixer such as a ribbon blender, a V-type blender or a Henschel mixer,
Alternatively, after mixing, a dry method of crushing using a dry crusher, or adding these compounds in a medium such as water, crush and mix using a wet crusher such as a medium stirring crusher, Alternatively, after pulverizing these compounds with a dry pulverizer, a slurry prepared by adding the mixture to a medium such as water and mixing it, by a wet method of drying by spray drying or the like, the prepared pulverized mixture is subjected to heat treatment. It is manufactured by firing.

【００１５】これらの粉砕混合法の中で、特に、発光中
心イオンの元素源化合物においては、少量の化合物を全
体に均一に混合、分散させる必要があることから液体媒
体を用いるのが好ましく、又、他の元素源化合物におい
て全体に均一な混合が得られる面からも、後者湿式法が
好ましく、又、加熱処理法としては、アルミナや石英製
の坩堝やトレイ等の耐熱容器中で、通常１０００〜１６
００℃、好ましくは１２００〜１５００℃の温度で、大
気、酸素、一酸化炭素、二酸化炭素、窒素、水素、アル
ゴン等の気体の単独或いは混合雰囲気下、１０分〜２４
時間、加熱することによりなされる。尚、加熱処理後、
必要に応じて、洗浄、乾燥、分級処理等がなされる。Among these pulverizing and mixing methods, particularly in the element source compound of the emission center ion, it is preferable to use a liquid medium because it is necessary to uniformly mix and disperse a small amount of the compound throughout the whole. The latter wet method is preferable also from the viewpoint that uniform mixing can be obtained in other element source compounds, and the heat treatment method is usually 1000 in a heat-resistant container such as a crucible or tray made of alumina or quartz. ~ 16
At a temperature of 00 ° C., preferably 1200 to 1500 ° C., in an atmosphere, a gas such as oxygen, carbon monoxide, carbon dioxide, nitrogen, hydrogen, and argon alone or in a mixed atmosphere, for 10 minutes to 24 minutes.
This is done by heating for a time. After the heat treatment,
If necessary, washing, drying, classification treatment and the like are performed.

【００１６】尚、前記加熱雰囲気としては、発光中心イ
オンの元素が発光に寄与するイオン状態（価数）を得る
ために必要な雰囲気が選択され、例えば、３価のＥｕ等
の場合には、大気、酸素、窒素、アルゴン等の酸化或い
は中性雰囲気下、３価のＣｅ等の場合には、大気、一酸
化炭素、二酸化炭素、窒素等の弱酸化或いは弱還元雰囲
気下、２価のＭｎ、２価のＥｕ、３価のＴｂ等の場合に
は、一酸化炭素、窒素、水素、アルゴン等の中性若しく
は還元雰囲気下、が採られる。As the heating atmosphere, an atmosphere necessary for obtaining the ionic state (valence) in which the element of the emission center ion contributes to light emission is selected. For example, in the case of trivalent Eu or the like, In the case of trivalent Ce or the like in an atmosphere of oxygen, oxygen, nitrogen, argon or the like or in a neutral atmosphere, divalent Mn in the atmosphere, a weak oxidizing or weak reducing atmosphere of carbon monoxide, carbon dioxide, nitrogen or the like. In the case of divalent Eu, trivalent Tb or the like, a neutral or reducing atmosphere such as carbon monoxide, nitrogen, hydrogen or argon is used.

【００１７】又、ここで、Ｍ1 源化合物、Ｍ2 源化合
物、及びＭ3 源化合物、並びに、発光中心イオンの元素
源化合物としては、Ｍ1 、Ｍ2 、及びＭ3 、並びに発光
中心イオンの元素の各酸化物、水酸化物、炭酸塩、硝酸
塩、硫酸塩、蓚酸塩、カルボン酸塩、ハロゲン化物等が
挙げられ、これらの中から、複合酸化物への反応性、及
び、焼成時におけるＮＯx 、ＳＯx 等の非発生性等を考
慮して選択される。The M 1 source compound, the M 2 source compound, the M 3 source compound, and the element source compound of the emission center ion include M 1 , M 2 , and M 3 , and the emission center ion. Oxides, hydroxides, carbonates, nitrates, sulphates, oxalates, carboxylates, halides, etc. of these elements, among them, reactivity to complex oxides, and during firing Is selected in consideration of non-generation of NO x , SO x, etc.

【００１８】２価の金属元素Ｍ1 として好ましいとする
前記Ｍｇ、Ｃａ、及びＺｎについて、それらのＭ1 源化
合物を具体的に例示すれば、Ｍｇ源化合物としては、Ｍ
ｇＯ、Ｍｇ（ＯＨ）2 、ＭｇＣＯ3 、Ｍｇ（ＯＨ）2 ・
３ＭｇＣＯ3 ・３Ｈ2 Ｏ、Ｍｇ（ＮＯ3 ）2 ・６Ｈ
2 Ｏ、ＭｇＳＯ4 、Ｍｇ（ＯＣＯ）2 ・２Ｈ2 Ｏ、Ｍｇ
（ＯＣＯＣＨ3 ）2 ・４Ｈ2 Ｏ、ＭｇＣｌ2 等が、又、
Ｃａ源化合物としては、ＣａＯ、Ｃａ（ＯＨ）2 、Ｃａ
ＣＯ3 、Ｃａ（ＮＯ3 ）2 ・４Ｈ2 Ｏ、ＣａＳＯ4・２
Ｈ2 Ｏ、Ｃａ（ＯＣＯ）2 ・Ｈ2 Ｏ、Ｃａ（ＯＣＯＣＨ
3 ）2 ・Ｈ2 Ｏ、ＣａＣｌ2 等が、又、Ｚｎ源化合物と
しては、ＺｎＯ、Ｚｎ（ＯＨ）2 、ＺｎＣＯ 3 、Ｚｎ
（ＮＯ3 ）2 、Ｚｎ（ＯＣＯ）2 、Ｚｎ（ＯＣＯＣ
Ｈ3 ）2 、ＺｎＣｌ 2 等が、それぞれ挙げられる。Divalent metal element M1As preferred
Regarding Mg, Ca, and Zn, their M1Source
As a specific example of the compound, the Mg source compound is M
gO, Mg (OH)2, MgCO3, Mg (OH)2・
3 MgCO3・ 3H2O, Mg (NO3)2・ 6H
2O, MgSOFour, Mg (OCO)2・ 2H2O, Mg
(OCOCH3)2・ 4H2O, MgCl2Etc.
As a Ca source compound, CaO, Ca (OH)2, Ca
CO3, Ca (NO3)2・ 4H2O, CaSOFour・ 2
H2O, Ca (OCO)2・ H2O, Ca (OCOCH
3)2・ H2O, CaCl2Etc., also with a Zn source compound
Then, ZnO, Zn (OH)2, ZnCO 3, Zn
(NO3)2, Zn (OCO)2, Zn (OCOC
H3)2, ZnCl 2Etc., respectively.

【００１９】又、３価の金属元素Ｍ2 として好ましいと
する前記Ａｌ、Ｓｃ、Ｙ、及びＬｕについて、それらの
Ｍ2 源化合物を具体的に例示するば、Ａｌ源化合物とし
ては、Ａｌ2 Ｏ3 、Ａｌ（ＯＨ）3 、ＡｌＯＯＨ、Ａｌ
（ＮＯ3 ）3 ・９Ｈ2 Ｏ、Ａｌ2 （ＳＯ4 ）3 、ＡｌＣ
ｌ3 等が、又、Ｓｃ源化合物としは、Ｓｃ2 Ｏ3 、Ｓｃ
（ＯＨ）3 、Ｓｃ2 （ＣＯ3 ）3 、Ｓｃ（ＮＯ3 ）3 、
Ｓｃ2 （ＳＯ4 ）3 、Ｓｃ2 （ＯＣＯ）6 、Ｓｃ（ＯＣ
ＯＣＨ3 ）3 、ＳｃＣｌ3 等が、又、Ｙ源化合物とし
は、Ｙ2 Ｏ3 、Ｙ（ＯＨ）3 、Ｙ2 （ＣＯ3 ）3 、Ｙ
（ＮＯ3 ）3 、Ｙ2（ＳＯ4 ）3 、Ｙ2 （ＯＣＯ）6 、
ＹＣｌ3 等が、又、Ｌｕ源化合物としは、Ｌｕ2 Ｏ3 、
Ｌｕ2 （ＳＯ4 ）3 、ＬｕＣｌ3 等が、それぞれ挙げら
れる。With respect to the above-mentioned Al, Sc, Y, and Lu, which are preferable as the trivalent metal element M 2 , the M 2 source compounds thereof are specifically exemplified. As the Al source compound, Al 2 O 3 , Al (OH) 3 , AlOOH, Al
(NO 3) 3 · 9H 2 O, Al 2 (SO 4) 3, AlC
l 3 and the like are Sc 2 O 3 and Sc as Sc source compounds.
(OH) 3 , Sc 2 (CO 3 ) 3 , Sc (NO 3 ) 3 ,
Sc 2 (SO 4 ) 3 , Sc 2 (OCO) 6 , Sc (OC
OCH 3) 3, ScCl 3 etc., also a Y source compound, Y 2 O 3, Y ( OH) 3, Y 2 (CO 3) 3, Y
(NO 3 ) 3 , Y 2 (SO 4 ) 3 , Y 2 (OCO) 6 ,
YCl 3 or the like may be used as the Lu source compound, and Lu 2 O 3 ,
Lu 2 (SO 4 ) 3 , LuCl 3 and the like can be mentioned respectively.

【００２０】又、４価の金属元素Ｍ3 として好ましいと
する前記Ｓｉ、Ｇｅ、及びＳｎについて、それらのＭ3
源化合物を具体的に例示すれば、Ｓｉ源化合物としは、
ＳｉＯ2 、Ｈ4 ＳｉＯ4 、Ｓｉ（ＯＣＯＣＨ3 ）4 等
が、又、Ｇｅ源化合物としは、ＧｅＯ2 、Ｇｅ（ＯＨ）
4 、Ｇｅ（ＯＣＯＣＨ3 ）4 、ＧｅＣｌ4 等が、又、Ｓ
ｎ源化合物としは、ＳｎＯ2 、ＳｎＯ2 ・ｎＨ 2Ｏ、Ｓ
ｎ（ＮＯ3 ）4 、Ｓｎ（ＯＣＯＣＨ3 ）4 、ＳｎＣｌ4
等が、それぞれ挙げられる。With respect to Si, Ge, and Sn, which are preferable as the tetravalent metal element M 3 , their M 3
As a specific example of the source compound, as the Si source compound,
SiO 2 , H 4 SiO 4 , Si (OCOCH 3 ) 4 and the like, and Ge source compounds include GeO 2 , Ge (OH)
4 , Ge (OCOCH 3 ) 4 , GeCl 4, etc.
Examples of the n-source compound include SnO 2 , SnO 2 · nH 2 O, S
n (NO 3 ) 4 , Sn (OCOCH 3 ) 4 , SnCl 4
Etc., respectively.

【００２１】更に、発光中心イオンの元素として好まし
いとする前記Ｍｎ、Ｃｅ、Ｅｕ、及びＴｂについて、そ
れらの元素源化合物を具体的に例示すれば、Ｍｎ源とし
ては、ＭｎＯ2 、Ｍｎ2 Ｏ3 、Ｍｎ3 Ｏ4 、ＭｎＯＯ
Ｈ、ＭｎＣＯ3 、Ｍｎ（ＮＯ3）2 、ＭｎＳＯ4 、Ｍｎ
（ＯＣＯＣＨ3 ）2 、Ｍｎ（ＯＣＯＣＨ3 ）3 、ＭｎＣ
ｌ2 、ＭｎＣｉ3 等が、又、Ｃｅ源化合物としは、Ｃｅ
2 Ｏ3 、ＣｅＯ2 、Ｃｅ（ＯＨ）3 、Ｃｅ（ＯＨ）4 、
Ｃｅ2 （ＣＯ3 ）3 、Ｃｅ（ＮＯ3 ）3 、Ｃｅ2（ＳＯ
4 ）3 、Ｃｅ（ＳＯ4 ）2 、Ｃｅ2 （ＯＣＯ）6 、Ｃｅ
（ＯＣＯＣＨ3 ） 3 、ＣｅＣｌ3 、ＣｅＣｌ4 等が、
又、Ｅｕ源化合物としは、Ｅｕ2 Ｏ3 、Ｅｕ 2 （Ｓ
Ｏ4 ）3 、Ｅｕ2 （ＯＣＯ）6 、ＥｕＣｌ2 、ＥｕＣｌ
3 等が、又、Ｔｂ源化合物としは、Ｔｂ2 Ｏ3 、Ｔｂ4
Ｏ7 、Ｔｂ2 （ＣＯ3 ）3 、Ｔｂ2 （ＳＯ 4 ）3 、Ｔｂ
Ｃｌ3 等が、それぞれ挙げられる。Further, it is preferable as an element of the emission center ion.
The above Mn, Ce, Eu, and Tb
Specific examples of these element source compounds are used as Mn sources.
For MnO2, Mn2O3, Mn3OFour, MnOO
H, MnCO3, Mn (NO3)2, MnSOFour, Mn
(OCOCH3)2, Mn (OCOCH3)3, MnC
l2, MnCi3In addition, the Ce source compound is Ce
2O3, CeO2, Ce (OH)3, Ce (OH)Four,
Ce2(CO3)3, Ce (NO3)3, Ce2(SO
Four)3, Ce (SOFour)2, Ce2(OCO)6, Ce
(OCOCH3) 3, CeCl3, CeClFourEtc.
The Eu source compound is Eu2O3, Eu 2(S
OFour)3, Eu2(OCO)6, EuCl2, EuCl
3In addition, the Tb source compound is Tb2O3, TbFour
O7, Tb2(CO3)3, Tb2(SO Four)3, Tb
Cl3Etc., respectively.

【００２２】以上、前記ガーネット結晶構造の化合物を
母体とし、該母体内に前記発光中心イオンを含有してな
る本発明の蛍光体は、その発光中心イオンの含有量が、
母体化合物１式量当たり０．０００１〜０．３モルであ
るのが好ましく、０．００１〜０．１５モルであるのが
更に好ましい。発光中心イオンの含有量が、前記範囲未
満では、発光強度が小さくなる傾向となり、一方、前記
範囲超過でも、濃度消光と呼ばれる現象により、やはり
発光強度が減少する傾向となる。As described above, the phosphor of the present invention comprising the compound having the garnet crystal structure as a matrix and containing the luminescent center ion in the matrix has a luminescent center ion content of
The amount is preferably 0.0001 to 0.3 mol, more preferably 0.001 to 0.15 mol, per 1 formula weight of the base compound. If the content of the emission center ion is less than the above range, the emission intensity tends to decrease, while if the content exceeds the range, the emission intensity also tends to decrease due to a phenomenon called concentration quenching.

【００２３】又、本発明の蛍光体は、波長変換材料とし
て用いられたとき、例えば、発光中心イオンが３価のＣ
ｅである場合、紫外光から青色領域の可視光の範囲の光
を吸収して、緑色、黄色、橙色、赤色、或いはそれらの
中間色等の、より長波長の可視光を発する。その励起光
の散乱成分を含まない、蛍光体の発光のみを分光測定し
た場合の発光色を、ＪＩＳ Ｚ８７０１で規定されるＸ
ＹＺ表色系で表したときの色度座標ｘとｙの和が、（ｘ
＋ｙ）≧０．６を満足するのが好ましく、（ｘ＋ｙ）≧
０．８を満足するのが更に好ましい。Further, when the phosphor of the present invention is used as a wavelength conversion material, for example, the emission center ion has a trivalent C
In the case of e, it absorbs light in the range of visible light from ultraviolet light to blue light and emits visible light of longer wavelength such as green, yellow, orange, red, or an intermediate color thereof. The emission color when only the emission of the fluorescent substance, which does not include the scattered component of the excitation light, is spectroscopically measured, is defined by JIS Z8701.
The sum of chromaticity coordinates x and y when expressed in the YZ color system is (x
+ Y) ≧ 0.6 is preferable, and (x + y) ≧
It is more preferable to satisfy 0.8.

【００２４】本発明の発光素子は、波長変換材料として
の前記蛍光体と、ＬＥＤやＬＤ等の半導体発光素子とか
ら構成されてなり、半導体発光素子の発する紫外光から
可視光の範囲の光を吸収してより長波長の可視光を発す
る演色性の高い発光素子であり、カラー液晶ディスプレ
イ等の画像表示装置や面発光等の照明装置等の光源とし
て好適である。The light emitting device of the present invention comprises the phosphor as a wavelength conversion material and a semiconductor light emitting device such as an LED or an LD, and emits light in the range from ultraviolet light to visible light emitted from the semiconductor light emitting device. It is a light-emitting element having a high color rendering property that absorbs and emits visible light having a longer wavelength, and is suitable as a light source for an image display device such as a color liquid crystal display or an illumination device for surface emission.

【００２５】本発明の発光素子を図面に基づいて説明す
ると、図２は、波長変換材料としての本発明の蛍光体
と、半導体発光素子とから構成される発光素子の一実施
例を示す模式的断面図、図３は、図２に示す発光素子を
組み込んだ面発光照明装置の一実施例を示す模式的断面
図であり、図２及び図３において、１は発光素子、２は
マウントリード、３はインナーリード、４は半導体発光
素子、５は蛍光体含有樹脂部、６は導電性ワイヤー、７
はモールド部材、８は面発光照明装置、９は拡散板、１
０は保持ケースである。The light emitting device of the present invention will be described with reference to the drawings. FIG. 2 is a schematic view showing one embodiment of a light emitting device composed of a phosphor of the present invention as a wavelength conversion material and a semiconductor light emitting device. FIG. 3 is a schematic cross-sectional view showing an embodiment of a surface emitting lighting device incorporating the light-emitting element shown in FIG. 2. In FIGS. 2 and 3, 1 is a light-emitting element, 2 is a mount lead, 3 is an inner lead, 4 is a semiconductor light emitting element, 5 is a phosphor-containing resin portion, 6 is a conductive wire, and 7 is a conductive wire.
Is a mold member, 8 is a surface emitting illuminating device, 9 is a diffusion plate, 1
0 is a holding case.

【００２６】本発明の発光素子１は、図２に示されるよ
うに、一般的な砲弾型の形態をなし、マウントリード２
の上部カップ内には、ＧａＮ系青色発光ダイオード等か
らなる半導体発光素子４が、その上が、本発明の蛍光体
をエポキシ樹脂やアクリル樹脂等のバインダーに混合、
分散させ、カップ内に流し込むことにより形成された蛍
光体含有樹脂部５で被覆されることにより固定されてい
る。一方、半導体発光素子４とマウントリード２、及び
半導体発光素子４とインナーリード３は、それぞれ導電
性ワイヤー６、６で導通されており、これら全体がエポ
キシ樹脂等によるモールド部材７で被覆、保護されてな
る。As shown in FIG. 2, the light emitting device 1 of the present invention has a general bullet shape, and has a mount lead 2
In the upper cup of the semiconductor light emitting device 4 composed of a GaN blue light emitting diode or the like, the phosphor of the present invention is mixed with a binder such as an epoxy resin or an acrylic resin.
It is fixed by being covered with the phosphor-containing resin portion 5 formed by dispersing and pouring it into the cup. On the other hand, the semiconductor light emitting element 4 and the mount lead 2, and the semiconductor light emitting element 4 and the inner lead 3 are electrically connected by conductive wires 6 and 6, respectively, and are entirely covered and protected by a molding member 7 made of epoxy resin or the like. It becomes.

【００２７】又、この発光素子１を組み込んだ面発光照
明装置８は、図３に示されるように、内面を白色の平滑
面等の光不透過性とした方形の保持ケース１０の底面
に、多数の発光素子１を、その外側に発光素子１の駆動
のための電源及び回路等（図示せず。）を設けて配置
し、保持ケース１０の蓋部に相当する箇所に、乳白色と
したアクリル板等の拡散板９を発光の均一化のために固
定してなる。Further, as shown in FIG. 3, the surface emitting lighting device 8 incorporating the light emitting element 1 has a bottom surface of a rectangular holding case 10 whose inner surface is a light opaque surface such as a white smooth surface. A large number of light emitting elements 1 are arranged with a power source and circuits (not shown) for driving the light emitting elements 1 provided outside thereof, and a milky white acrylic resin is provided at a position corresponding to the lid of the holding case 10. A diffusing plate 9 such as a plate is fixed for uniform light emission.

【００２８】そして、面発光照明装置８を駆動して、発
光素子１の半導体発光素子４に電圧を印加することによ
り青色光等を発光させ、その発光の一部を、蛍光体含有
樹脂部５における波長変換材料としての本発明の蛍光体
が吸収し、より長波長の光を発光し、一方、蛍光体に吸
収されなかった青色光等との混色により演色性の高い発
光が得られ、この光が拡散板９を透過して、図面上方に
出射され、保持ケース１０の拡散板９面内において均一
な明るさの照明光が得られることとなる。Then, the surface emitting lighting device 8 is driven to apply a voltage to the semiconductor light emitting element 4 of the light emitting element 1 to emit blue light or the like, and a part of the emitted light is emitted from the phosphor-containing resin portion 5. Is absorbed by the phosphor of the present invention as a wavelength conversion material in, to emit light of a longer wavelength, on the other hand, high color rendering luminescence is obtained by color mixing with blue light which is not absorbed by the phosphor. The light passes through the diffusion plate 9 and is emitted upward in the drawing, so that the illumination light having a uniform brightness is obtained within the surface of the diffusion plate 9 of the holding case 10.

【００２９】[0029]

【実施例】以下、本発明を実施例によりさらに具体的に
説明するが、本発明はその要旨を越えない限り以下の実
施例に限定されるものではない。EXAMPLES The present invention will be described in more detail with reference to the following examples, but the present invention is not limited to the following examples as long as the gist thereof is not exceeded.

【００３０】実施例１ Ｍ1 源化合物としてＣａＣＯ3 ；０．０２９７モル、Ｍ
2 源化合物としてＳｃ 2 Ｏ3 ；０．０１モル、及びＭ3
源化合物としてＳｉＯ2 ；０．０３モル、並びに発光中
心イオンの元素源化合物としてＣｅ（ＯＣＯＣ
Ｈ3 ）3 ；０．０００３モルを純水と共に、アルミナ製
容器及びビーズの湿式ボールミル中で粉砕、混合し、乾
燥後、ナイロンメッシュを通過させた後、得られた粉砕
混合物をアルミナ製坩堝中で、大気下、１４００℃で２
時間、加熱することにより焼成し、引き続いて、水洗
浄、乾燥、及び分級処理を行うことにより蛍光体を製造
した。Example 1 M1CaCO as a source compound30.0297 mol, M
2Sc as source compound 2O30.01 mol, and M3
SiO as the source compound20.03 mol, and emitting light
Ce (OCOC) as an element source compound of heart ions
H3)30.0003 mol made of alumina together with pure water
Grind, mix and dry in a wet ball mill of containers and beads.
After drying, let it pass through a nylon mesh and then pulverize
Mix the mixture in an alumina crucible at 1400 ° C under air for 2
Baking by heating for a time, followed by washing with water
Manufacture phosphors by cleaning, drying, and classifying
did.

【００３１】得られた蛍光体は、粉末Ｘ線回折による解
析により、表１に示す組成のガーネット結晶構造の化合
物を母体とし、該母体内に発光中心イオンとして３価の
Ｃｅを含有するものであることが確認された。又、この
蛍光体の発光スペクトルと励起スペクトルを測定し、図
１に示した。この発光スペクトルから、ＪＩＳ Ｚ８７
２２で規定されるＸＹＺ表色系における色度座標ｘとｙ
を、波長間隔５ｎｍとして算出したところ、ｘ＝０．２
８、ｙ＝０．５４であり、ｘ＋ｙ＝０．８２であった。
又、この蛍光体に、ＧａＮ系青色発光ダイオード（ピー
ク波長４６５ｎｍ）の青色光を照射し、その照射強度を
調節したところ、その青色光を吸収して黄緑色光を発光
し、蛍光体に吸収されなかったダイオードの青色光との
混色によりやや青味がかった白色を示した。The obtained phosphor has a garnet crystal structure compound having the composition shown in Table 1 as a matrix by analysis by powder X-ray diffraction, and contains trivalent Ce as an emission center ion in the matrix. It was confirmed that there is. The emission spectrum and excitation spectrum of this phosphor were measured and are shown in FIG. From this emission spectrum, JIS Z87
Chromaticity coordinates x and y in the XYZ color system defined by No. 22
Was calculated with a wavelength interval of 5 nm, x = 0.2
8, y = 0.54 and x + y = 0.82.
In addition, this phosphor was irradiated with blue light of a GaN-based blue light emitting diode (peak wavelength 465 nm), and when the irradiation intensity was adjusted, the blue light was absorbed to emit yellow-green light, which was absorbed by the phosphor. It showed a slightly bluish white color due to the unmixed color of the diode with the blue light.

【００３２】実施例２ Ｍ1 源化合物としてＣａＣＯ3 ；０．０１４７モルと、
Ｍｇ（ＯＨ）2 ・３ＭｇＣＯ3 ・３Ｈ2 Ｏ；Ｍｇとして
０．０１５モル、Ｍ2 源化合物としてＳｃ2 Ｏ 3 ；０．
００７５モルと、Ｙ2 Ｏ3 ；０．００２５モルを、それ
ぞれ用いた外は、実施例１と同様にして蛍光体を製造し
た。得られた蛍光体は、粉末Ｘ線回折による解析によ
り、表１に示す組成のガーネット結晶構造の化合物を母
体とし、該母体内に発光中心イオンとして３価のＣｅを
含有するものであることが確認された。又、この蛍光体
の発光スペクトルと励起スペクトルを測定し、図２に示
した。この発光スペクトルから、実施例１と同様にして
色度座標ｘとｙを算出したところ、ｘ＝０．４３、ｙ＝
０．５３であり、ｘ＋ｙ＝０．９６であった。又、この
蛍光体に、実施例１と同様にして青色光を照射し、その
照射強度を調節したところ、その青色光を吸収して黄色
光を発光し、蛍光体に吸収されなかった青色光との混色
により白色を示した。Example 2 M1CaCO as a source compound30.0147 mol;
Mg (OH)2・ 3MgCO3・ 3H2O; as Mg
0.015 mol, M2Sc as source compound2O 30.
0075 mol and Y2O30.0025 moles it
A phosphor was manufactured in the same manner as in Example 1 except that each was used.
It was The obtained phosphor was analyzed by powder X-ray diffraction.
The garnet crystal structure compound having the composition shown in Table 1
And trivalent Ce as an emission center ion in the mother body
It was confirmed that it contained. Also, this phosphor
The emission spectrum and excitation spectrum of were measured and shown in Fig. 2.
did. From this emission spectrum, in the same manner as in Example 1,
When chromaticity coordinates x and y are calculated, x = 0.43, y =
It was 0.53 and x + y = 0.96. Also, this
The phosphor is irradiated with blue light in the same manner as in Example 1,
When the irradiation intensity is adjusted, it absorbs the blue light and becomes yellow.
Color mixing with blue light that emits light and is not absorbed by the phosphor
Showed white.

【００３３】実施例３ 加熱処理の温度を１２００℃とした外は、実施例１と同
様にして蛍光体を製造した。得られた蛍光体は、粉末Ｘ
線回折による解析により、表１に示す組成のガーネット
結晶構造の化合物を母体とし、該母体内に発光中心イオ
ンとして３価のＣｅを含有するものであることが確認さ
れた。又、この蛍光体の発光スペクトルから、実施例１
と同様にして色度座標ｘとｙを算出したところ、ｘ＝
０．２８、ｙ＝０．５４であり、ｘ＋ｙ＝０．８２であ
った。又、この蛍光体に、実施例１と同様にして青色光
を照射し、その照射強度を調節したところ、その青色光
を吸収して黄緑色光を発光し、蛍光体に吸収されなかっ
た青色光との混色によりよりやや青味がかった白色を示
した。Example 3 A phosphor was manufactured in the same manner as in Example 1 except that the heat treatment temperature was 1200 ° C. The obtained phosphor is powder X
Analysis by line diffraction confirmed that the compound having the composition shown in Table 1 and having a garnet crystal structure was used as a matrix, and the matrix contained trivalent Ce as an emission center ion. In addition, from the emission spectrum of this phosphor, Example 1
When chromaticity coordinates x and y are calculated in the same manner as
0.28, y = 0.54, and x + y = 0.82. Further, this phosphor was irradiated with blue light in the same manner as in Example 1, and the irradiation intensity was adjusted. As a result, the blue light was absorbed and yellow-green light was emitted, and the blue light not absorbed by the phosphor was detected. Due to the color mixture with the light, it showed a slightly bluish white color.

【００３４】実施例４ Ｍ2 源化合物としてＳｃ2 Ｏ3 ；０．００５０モルと、
Ｙ2 Ｏ3 ；０．００５０モルを用いた外は、実施例２と
同様にして蛍光体を製造した。得られた蛍光体は、粉末
Ｘ線回折による解析により、表１に示す組成のガーネッ
ト結晶構造の化合物を母体とし、該母体内に発光中心イ
オンとして３価のＣｅを含有するものであることが確認
された。又、この蛍光体の発光スペクトルから、実施例
１と同様にして色度座標ｘとｙを算出したところ、ｘ＝
０．４７、ｙ＝０．５０であり、ｘ＋ｙ＝０．９７であ
った。又、この蛍光体に、実施例１と同様にして青色光
を照射し、その照射強度を調節したところ、その青色光
を吸収して黄色光を発光し、蛍光体に吸収されなかった
青色光との混色により白色を示した。Example 4 Sc 2 O 3 as the M 2 source compound; 0.0050 mol,
A phosphor was manufactured in the same manner as in Example 2, except that 0.0050 mol of Y 2 O 3 was used. According to the analysis by powder X-ray diffraction, the obtained phosphor has a compound having a garnet crystal structure having the composition shown in Table 1 as a matrix, and the matrix contains trivalent Ce as an emission center ion. confirmed. Further, chromaticity coordinates x and y were calculated from the emission spectrum of this phosphor in the same manner as in Example 1, and x =
It was 0.47, y = 0.50, and x + y = 0.97. Further, this phosphor was irradiated with blue light in the same manner as in Example 1, and the irradiation intensity was adjusted. As a result, the blue light was absorbed and yellow light was emitted, and the blue light not absorbed by the phosphor was detected. A white color was obtained by mixing with.

【００３５】実施例５ Ｍ2 源化合物としてＳｃ2 Ｏ3 ；０．００５０モルと、
Ｌｕ2 Ｏ3 ；０．００５０モルを用いた外は、実施例２
と同様にして蛍光体を製造した。得られた蛍光体は、粉
末Ｘ線回折による解析により、表１に示す組成のガーネ
ット結晶構造の化合物を母体とし、該母体内に発光中心
イオンとして３価のＣｅを含有するものであることが確
認された。又、この蛍光体の発光スペクトルから、実施
例１と同様にして色度座標ｘとｙを算出したところ、ｘ
＝０．４５、ｙ＝０．５３であり、ｘ＋ｙ＝０．９８で
あった。又、この蛍光体に、実施例１と同様にして青色
光を照射し、その照射強度を調節したところ、その青色
光を吸収して黄色光を発光し、蛍光体に吸収されなかっ
た青色光との混色により白色を示した。Example 5 Sc 2 O 3 as the M 2 source compound; 0.0050 mol,
Lu 2 O 3 ; Example 2 except that 0.0050 mol was used.
A phosphor was manufactured in the same manner as in. According to the analysis by powder X-ray diffraction, the obtained phosphor has a compound having a garnet crystal structure having the composition shown in Table 1 as a matrix, and the matrix contains trivalent Ce as an emission center ion. confirmed. Further, when chromaticity coordinates x and y were calculated from the emission spectrum of this phosphor in the same manner as in Example 1, x was calculated.
= 0.45, y = 0.53, and x + y = 0.98. Further, this phosphor was irradiated with blue light in the same manner as in Example 1, and the irradiation intensity was adjusted. As a result, the blue light was absorbed and yellow light was emitted, and the blue light not absorbed by the phosphor was detected. A white color was obtained by mixing with.

【００３６】実施例６ Ｍ1 源化合物としてＣａＣＯ3 ；０．０１４７モルと、
ＺｎＯ；０．０１５モルを用いた外は、実施例１と同様
にして蛍光体を製造した。得られた蛍光体は、粉末Ｘ線
回折による解析により、表１に示す組成のガーネット結
晶構造の化合物を母体とし、該母体内に発光中心イオン
として３価のＣｅを含有するものであることが確認され
た。又、この蛍光体の発光スペクトルから、実施例１と
同様にして色度座標ｘとｙを算出したところ、ｘ＝０．
２９、ｙ＝０．５４であり、ｘ＋ｙ＝０．８３であっ
た。又、この蛍光体に、実施例１と同様にして青色光を
照射し、その照射強度を調節したところ、その青色光を
吸収して黄緑色光を発光し、蛍光体に吸収されなかった
青色光との混色によりやや青味がかった白色を示した。Example 6 CaCO 3 as the M 1 source compound; 0.0147 mol,
A phosphor was manufactured in the same manner as in Example 1 except that ZnO; 0.015 mol was used. According to the analysis by powder X-ray diffraction, the obtained phosphor had a garnet crystal structure compound having the composition shown in Table 1 as a base, and contained trivalent Ce as an emission center ion in the base. confirmed. Further, when the chromaticity coordinates x and y were calculated from the emission spectrum of this phosphor in the same manner as in Example 1, x = 0.
29, y = 0.54, and x + y = 0.83. Further, this phosphor was irradiated with blue light in the same manner as in Example 1, and the irradiation intensity was adjusted. As a result, the blue light was absorbed and yellow-green light was emitted, and the blue light not absorbed by the phosphor was detected. It showed a bluish white color due to the color mixture with light.

【００３７】[0037]

【表１】 [Table 1]

【００３８】[0038]

【発明の効果】本発明によれば、製造が容易であると共
に、演色性の高い発光素子を得ることができる蛍光体、
及び、その蛍光体を用いた発光素子、並びに、その発光
素子を光源とする画像表示装置及び照明装置を提供する
ことができる。EFFECTS OF THE INVENTION According to the present invention, a phosphor which is easy to manufacture and is capable of obtaining a light emitting device having a high color rendering property,
Further, it is possible to provide a light emitting element using the phosphor, and an image display device and a lighting device using the light emitting element as a light source.

【図面の簡単な説明】[Brief description of drawings]

【図１】 本発明の実施例１で得られた蛍光体の発光ス
ペクトル及び励起スペクトルである。FIG. 1 is an emission spectrum and an excitation spectrum of the phosphor obtained in Example 1 of the present invention.

【図２】 本発明の実施例２で得られた蛍光体の発光ス
ペクトル及び励起スペクトルである。FIG. 2 is an emission spectrum and an excitation spectrum of the phosphor obtained in Example 2 of the present invention.

【図３】 波長変換材料としての本発明の蛍光体と、半
導体発光素子とから構成される発光素子の一実施例を示
す模式的断面図である。FIG. 3 is a schematic cross-sectional view showing an example of a light emitting element including a phosphor of the present invention as a wavelength conversion material and a semiconductor light emitting element.

【図４】 図３に示す発光素子を組み込んだ面発光照明
装置の一実施例を示す模式的断面図である。FIG. 4 is a schematic cross-sectional view showing an example of a surface emitting lighting device incorporating the light emitting element shown in FIG.

【符号の説明】[Explanation of symbols]

１；発光素子 ２；マウントリード ３；インナーリード ４；半導体発光素子 ５；蛍光体含有樹脂部 ６；導電性ワイヤー ７；モールド部材 ８；面発光照明装置 ９；拡散板 １０；保持ケース 1; Light emitting device 2; Mount lead 3; Inner lead 4; Semiconductor light emitting element 5; Phosphor-containing resin part 6; Conductive wire 7; Mold member 8: Surface emitting lighting device 9; Diffuser 10; holding case

───────────────────────────────────────────────────── フロントページの続き Ｆターム(参考） 4H001 CA02 CA04 CA06 XA12 XA13 XA14 XA20 XA21 XA22 XA30 XA31 XA32 XA38 XA39 XA40 XA48 XA49 XA50 XA56 XA57 XA64 XA71 XA72 YA24 YA25 YA26 YA27 YA28 YA29 YA58 YA59 YA60 YA62 YA63 YA65 YA66 YA67 YA68 YA69 YA70 5F041 AA11 AA12 EE25    ─────────────────────────────────────────────────── ─── Continued front page    F-term (reference) 4H001 CA02 CA04 CA06 XA12 XA13                       XA14 XA20 XA21 XA22 XA30                       XA31 XA32 XA38 XA39 XA40                       XA48 XA49 XA50 XA56 XA57                       XA64 XA71 XA72 YA24 YA25                       YA26 YA27 YA28 YA29 YA58                       YA59 YA60 YA62 YA63 YA65                       YA66 YA67 YA68 YA69 YA70                 5F041 AA11 AA12 EE25

Claims (16)

【特許請求の範囲】[Claims] 【請求項１】 下記一般式(I) で表されるガーネット結
晶構造の化合物を母体とし、該母体内に発光中心イオン
を含有してなることを特徴とする蛍光体。 Ｍ1 a Ｍ2 b Ｍ3 c Ｏd (I) 〔式(I) 中、Ｍ1 は２価の金属元素、Ｍ2 は３価の金属
元素、Ｍ3 は４価の金属元素をそれぞれ示し、ａは２．
７〜３．３、ｂは１．８〜２．２、ｃは２．７〜３．
３、ｄは１１．０〜１３．０の範囲の数である。〕1. A phosphor comprising a compound having a garnet crystal structure represented by the following general formula (I) as a matrix and containing a luminescent center ion in the matrix. M 1 a M 2 b M 3 c O d (I) [In the formula (I), M 1 represents a divalent metal element, M 2 represents a trivalent metal element, and M 3 represents a tetravalent metal element. , A is 2.
7 to 3.3, b is 1.8 to 2.2, and c is 2.7 to 3.
3 and d are numbers in the range of 11.0 to 13.0. ] 【請求項２】 式(I) における２価の金属元素Ｍ1 が、
Ｍｇ、Ｃａ、Ｚｎ、Ｓｒ、Ｃｄ、及びＢａからなる群か
ら選択された少なくとも１種である請求項１に記載の蛍
光体。2. The divalent metal element M 1 in formula (I) is
The phosphor according to claim 1, which is at least one selected from the group consisting of Mg, Ca, Zn, Sr, Cd, and Ba. 【請求項３】 式(I) における２価の金属元素Ｍ1 が、
Ｍｇ、Ｃａ、又はＺｎである請求項２に記載の蛍光体。3. The divalent metal element M 1 in formula (I) is
The phosphor according to claim 2, which is Mg, Ca, or Zn. 【請求項４】 式(I) における３価の金属元素Ｍ2 が、
Ａｌ、Ｓｃ、Ｇａ、Ｙ、Ｉｎ、Ｌａ、Ｇｄ、及びＬｕか
らなる群から選択された少なくとも１種である請求項１
乃至３のいずれかに記載の蛍光体。4. The trivalent metal element M 2 in formula (I) is
2. At least one selected from the group consisting of Al, Sc, Ga, Y, In, La, Gd, and Lu.
4. The phosphor according to any one of 3 to 3. 【請求項５】 式(I) における３価の金属元素Ｍ2 が、
Ａｌ、Ｓｃ、Ｙ、又はＬｕである請求項４に記載の蛍光
体。5. The trivalent metal element M 2 in formula (I) is
The phosphor according to claim 4, which is Al, Sc, Y, or Lu. 【請求項６】 式(I) における４価の金属元素Ｍ3 が、
Ｓｉ、Ｔｉ、Ｇｅ、Ｚｒ、Ｓｎ、及びＨｆからなる群か
ら選択された少なくとも１種である請求項１乃至５のい
ずれかに記載の蛍光体。6. The tetravalent metal element M 3 in formula (I) is
The phosphor according to claim 1, which is at least one selected from the group consisting of Si, Ti, Ge, Zr, Sn, and Hf. 【請求項７】 式(I) における４価の金属元素Ｍ3 が、
Ｓｉ、Ｇｅ、又はＳｎである請求項６に記載の蛍光体。7. The tetravalent metal element M 3 in formula (I) is
The phosphor according to claim 6, which is Si, Ge, or Sn. 【請求項８】 発光中心イオンが、Ｃｒ、Ｍｎ、Ｆｅ、
Ｃｏ、Ｎｉ、Ｃｕ、Ｃｅ、Ｐｒ、Ｎｄ、Ｓｍ、Ｅｕ、Ｔ
ｂ、Ｄｙ、Ｈｏ、Ｅｒ、Ｔｍ、及びＹｂからなる群から
選択された少なくとも１種の元素である請求項１乃至７
のいずれかに記載の蛍光体。8. The emission center ion is Cr, Mn, Fe,
Co, Ni, Cu, Ce, Pr, Nd, Sm, Eu, T
8. At least one element selected from the group consisting of b, Dy, Ho, Er, Tm, and Yb.
The phosphor according to any one of 1. 【請求項９】 発光中心イオンが、３価のＣｅである請
求項８に記載の蛍光体。9. The phosphor according to claim 8, wherein the luminescent center ion is trivalent Ce. 【請求項１０】 式(I) における２価の金属元素Ｍ1 が
Ｃａであり、３価の金属元素Ｍ2 がＳｃであり、４価の
金属元素Ｍ3 がＳｉである請求項１乃至９のいずれかに
記載の蛍光体。10. The divalent metal element M 1 in the formula (I) is Ca, the trivalent metal element M 2 is Sc, and the tetravalent metal element M 3 is Si. The phosphor according to any one of 1. 【請求項１１】 式(I) における２価の金属元素Ｍ1 が
ＣａとＭｇであり、３価の金属元素Ｍ2 がＳｃとＹ、又
はＳｃとＬｕであり、４価の金属元素Ｍ3 がＳｉである
請求項１乃至９のいずれかに記載の蛍光体。11. The divalent metal element M 1 in the formula (I) is Ca and Mg, the trivalent metal element M 2 is Sc and Y, or Sc and Lu, and the tetravalent metal element M 3 Is Si, The fluorescent substance in any one of Claim 1 thru | or 9. 【請求項１２】 発光中心イオンの含有量が、母体化合
物１式量当たり０．０００１〜０．３モルである請求項
１乃至１１のいずれかに記載の蛍光体。12. The phosphor according to claim 1, wherein the content of the luminescence center ion is 0.0001 to 0.3 mol per 1 formula weight of the base compound. 【請求項１３】 発光色を、ＸＹＺ表色系で表したとき
の色度座標ｘとｙの和が、（ｘ＋ｙ）≧０．６を満足す
る請求項１乃至１２のいずれかに記載の蛍光体。13. The fluorescence according to claim 1, wherein the sum of chromaticity coordinates x and y when the emission color is represented by an XYZ color system satisfies (x + y) ≧ 0.6. body. 【請求項１４】 波長変換材料としての請求項１乃至１
３のいずれかに記載の蛍光体と、紫外光から可視光の範
囲の光を発光する半導体発光素子とから構成されてなる
ことを特徴とする発光素子。14. A wavelength conversion material according to any one of claims 1 to 1.
3. A light emitting device comprising the phosphor according to any one of 3 and a semiconductor light emitting device that emits light in the range of ultraviolet light to visible light. 【請求項１５】 請求項１４記載の発光素子を光源とす
る画像表示装置。15. An image display device using the light emitting device according to claim 14 as a light source. 【請求項１６】 請求項１４記載の発光素子を光源とす
る照明装置。16. An illuminating device using the light emitting element according to claim 14 as a light source.
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